Many a Sunday my wife and son buy a boule at the local farmer's market which they call Spinach Cheese Bread, even though it has lots of other veggie stuff in it too. They like it, so for last week's baking session I decided to try and make my own.
First problem was no recipe available on the Internet that seemed to make what I wanted. So I had to make my own. I decided to use frozen chopped spinach, mild gouda cheese (what else to expect from a Dutchman), and I also wanted to have a portion of whole wheat flour in it. I've made whole wheat bread before and using a poolish did wonders for my schedule as well as for the dough and overall taste. So, I decided this one was to use a poolish too!
I've also been working on a spreadsheet the allows me to do all baker percentage calculations (helps with recipe scaling and design). While I was at it, I added an ingredient database to it with cost information, hydration information and specific gravity for ingredients so I can correctly convert weight measurements to volumes for those we like to bake that way. You'll find a PDF of this recipe here.
A few words about the spreadsheet
The spreadsheet's yellow cells is where you input your desired values (this includes ingredients). A "Y" in the "Pre" column indicates an ingredient that is part of a preferment. A "P" indicates an ingredient that is a separately created preferment. Although there are different options for baker's percentages when using preferments, I have chosen to express everything as percentages of dough in the overall recipe. Note that tap water temperature, mixer friction and baking loss are specific to my situation (and an estimate I am still refining for each type of bread for the loss, mostly evaporation, and friction).
The component temperatures are to be entered on the bottom, if you want to be precise with final dough temperature. If necessary it will calculate how much ice to add to the water if it needs cooling (rarely the case in my home baking). The spreadsheet automatically adjusts for the number of components that have a temperature specified so if you do not enter a value for the preferment (presumably because you are not using one), the factor will be 3 instead of 4.
Some measurements in the "US Weight" column are given in tablespoons etc. The spreadsheet does this if the actual value as a weight becomes so small that, with most scales, you can not accurately measure. Since I have (pretty accurate) specific gravity values for the ingredients, I can quite reliably (subject to all the fallacies of measuring volumes: packed, spooned, shifted) give the volume. I use a scale accurate to 1 gram myself, but for these small amounts, a small measuring spoon workds great (I have a set for dashes, smidgens, and pinches as well).
Hydration is calculated by computing the water content of all ingredients that are composed 50% or more of water and adding them up. That catches water, milk, eggs etc., but does not count water content in dough. Cost is based on a home baker buying pretty regular ingredients in a super market. The exception is that I use KA prices for my flour as I will not use the cheap stuff.
Making the poolish is straightforward. I make it the night before and leave it on the counter (about 68F), and it'll be close enough to ready the next morning around 11AM. The amount of final dough in this recipe is about right for an 8" banneton (scaled up from what I used to make the one in the picture above, which got misshaped whe inverting onto the peel). Nevertheless, it is borderline not enough to knead properly in my KitchenAid so I finish with manual labor.
In the last minute or two of kneading I add the cheese (room temperature, cubed in 1/4" pieces), and spinach. I made the mistake of not squeezing enough water out of the thawed spinach, so my dough got too wet and I had to add flour (not represented in the recipe because you should squeeze it out).
Next bulk ferment, about 90 minutes in my case. I did a fold about half way through. Next degas and preshape. Twenty minutes relaxing and final shaping.
I preheated oven at 500F, with water for pre-steam added in a baking pan in the last few minutes. Invert the bread out of the banneton onto parchment paper on the peel. Scored in a \ | / pattern, a sprayed with water. Into the over on baking stone, more water in the pan for steaming. Spray oven walls with water twice, 30 seconds apart after putting loaf in the oven. Then reduce to 475F.
Baked for a total of 35 minutes, oven vented for last 10. Here was the result.