Step 1

Put the pizza dough in a medium bowl and coat well with 1 tablespoon of the oil. Cover with plastic wrap and put in a warm place until doubled in bulk, about 1 hour depending on the dough.

Step 2

Meanwhile, preheat the oven to 400 degrees F. Put the garlic, bell peppers and onions in a food processor and pulse until finely chopped, scraping down the sides of the bowl halfway through.

Step 3

Heat the remaining 1 tablespoon oil in a medium saucepan over medium-high heat until shimmering. Add the sausage and cook, breaking it up with a wooden spoon, until lightly browned, about 4 minutes. Add the onion mixture and cook, stirring occasionally, until the moisture has evaporated from the pan and the onions are soft, about 5 minutes. Stir in the marinara sauce, oregano, red pepper flakes, 1/4 cup water, 1/2 teaspoon salt and several grinds of black pepper. Bring to a simmer, reduce the heat to medium low and cook, uncovered, stirring often, until thick, about 15 minutes.

Step 4

Brush the sides and lip of a 1-quart (6-inch) ramekin with the butter. Line the bottom and sides with the Havarti. Fill with 1 1/2 cups of the hot marinara-sausage sauce. Reserve the remaining sauce for another use. Gently pull and stretch the pizza dough into a 10-inch circle and place it over the ramekin, leaving a 2-inch overhang all around. Gently press around the edges of the ramekin to lightly seal. Put on a baking sheet and bake until golden brown and the top sounds hollow when you tap it, about 30 minutes.

Step 5

Carefully remove the baking sheet from the oven, transfer the ramekin to a heatproof surface and place a plate on top. Carefully invert the ramekin onto the plate, using a spoon to gently pry the dough from the dish. Serve hot.