Step 1

Heat oven to 450 degrees. Prepare sauce: In a large skillet over medium heat, heat oil until shimmering. Stir in garlic and red pepper flakes, and cook until fragrant, about 1 minute. Stir in tomatoes, basil sprig, salt and pepper, and bring to a brisk simmer. Simmer until sauce is very thick and most of the moisture is evaporated, 15 to 20 minutes. It should be thicker than the usual marinara sauce. Remove and discard basil sprig.

Step 2

While sauce is cooking, toss broccoli with oil, red pepper flakes and salt on a quarter-size rimmed baking sheet (or use a regular sized rimmed baking sheet), and place in oven.

Step 3

Arrange sausage in a single layer on a quarter-size rimmed baking sheet or in a 9-by-13-inch roasting pan, and roast along with broccoli until golden on the bottom, about 15 minutes. Flip sausages over so browned sides are on top.

Step 4

When you flip the sausages, remove broccoli from oven and toss with sliced garlic. (Reserve grated garlic for later.) Drizzle broccoli with a little more oil. Return pan to oven and continue to roast broccoli and sausages until sausages are cooked through and broccoli is tender and browned, about 5 minutes longer.

Step 5

Meanwhile, mix ricotta with grated garlic.

Step 6

When broccoli is done, remove from oven and tent with foil to keep warm. Top sausage with tomato sauce and dollops of ricotta, then drizzle with olive oil and grind pepper generously over top. Sprinkle on mozzarella and Parmesan. Bake until cheese is melted and bubbly, and the garlic is opaque, 3 to 5 minutes. Or if you prefer you can broil the cheese to melt it, 1 to 3 minutes.

Step 7

Serve sausages, sauce and cheeses with broccoli on the side. Pass crusty bread for sopping up the tomato sauce.