I found this recipe that was the main inspiration, but I wanted to add broccoli so I took some hints from this recipe too. I also have a 22cm tin and the recipe called for 20cm, so I tried to scale everything up a bit.
Final ingredients list for my version:
100g butter, cubed
200g all-purpose flour
3 1/4 tbsp cold water
Hand mix flour & butter to crumb consistency, add water, form dough ball, roll out on floured counter, set in tin, refrigerate 20-30 minutes, blind bake 10 minutes at 450 degrees, remove blind and bake 10 more minutes.
6 strips of bacon
1 big onion, sliced & carmelized
1 medium broccoli crown, cut small and added to the onions for the last 10 min of carmelization
160g Gruyère cheese, grated 4 large eggs
200 ml whipping cream
100 ml whole milk
Salt & pepper
It ended up taking about 40-45 minutes in the oven at 350 degrees.
It was GREAT if I do say so myself! Could have used a bit more salt, a bit more filling overall, but I'd make this again for sure.