It's not really a tart. It is a giant popover or Yorkshire pudding.
You preheat the pan with bacon fat then quickly pour the pancake batter into the hot pan, then cover with the cooked onions and bacon. This monster puffs up like a Dutch Baby around the sides and makes this yummy onion pancake sort of thing.
Since I took the liberty of using a cast iron skillet this thing slid right out of the pan and I cut it into wedges like a pizza and served it to every food tester (neighbor) that I could find (it was big) and we all loved it.
This recipe is a keeper.
Onion Bacon Puff
Nutrition Facts
Serving Size 104g (4 oz) Serves 10
Amount Per Serving
Calories 238
Total Fat 16.2g
Saturated Fat 7.1g
Trans Fat 0.0g
Cholesterol 111mg
Sodium 558mg
Total Carbohydrates 9.6g
Dietary Fiber 1.3g
Sugars 1.6g
Protein 13.7g
6 oz. smoked bacon, cut into 1/4" matchsticks
4 tablespoons unsalted butter
2 medium yellow onions, thinly sliced lengthwise
Kosher salt and freshly ground black pepper, to taste
1 cup rolled oats (old fashioned oatmeal)
4 large eggs
1 cup cottage cheese
1 teaspoon baking powder
2 teaspoon dry mustard (substitute the yellow hotdog mustard if you must)
1 tablespoon unsalted butter
1/4 cup milk (any type)
1 teaspoon buttermilk blend (optional)
Heat bacon in a 12inch caste iron skillet over medium-high heat, and cook, stirring occasionally, until fat renders and bacon is crisp, about 12 minutes.
Using a slotted spoon, transfer bacon to paper towels to drain.
Reserve bacon fat for later use.
Return skillet to medium-high heat, and add butter, onions, salt and pepper, and cook, stirring, until lightly caramelized, about 10 minutes.
Remove from skillet and set aside.
Heat oven to 425F°.
Make the batter: In blender/food processor mix the remaining ingredients and process until completely smooth. Let batter rest for 10 minutes.
Meanwhile, place cast iron skillet with bacon fat in oven and let heat for 10 minutes.
Remove skillet from the oven and pour in batter. Quickly sprinkle with rendered bacon and caramelized onions; return to oven and bake until puffed and golden brown, about 30 minutes.
Best served immediately, but also good a few hours later at room temperature.
This was delicious.