I used a small amount of panko breadcrumbs to absorb the sausage oil, one small yellow onion, a few tablespoons of sour cream and an egg, along with the chorizo and cheese.
This is the same filling mixture with diced boiled potato added. Baked.
When I do this next time (never) I'll warm the egg first with hot tap water (as if) and separate the yolk (not gonna happen) to add separately near the end. (Who am I fooling?)