Baked Ziti with Hot Italian Sausage, Swiss Chard, and Crème Fraîche

INGREDIENTS

1 lb

Spicy or sweet italian sausage

2 cloves

Garlic

Onion, medium

1 tbsp

Oregano, fresh

2 28 ounce cans

San marzano tomatoes

5 oz

Swiss chard

Egg

1 lb

Ziti

Kosher salt and freshly ground black pepper

2 tbsp

Olive oil

1 cup

Creme fraiche or heavy cream

3/4 lb

Mozzarella

1 cup

Pecorino or parmigiano reggiano, grated

1 cup

Ricotta cheese

1 teaspoon (or less if sensitive to heat) crushed red pepper flakes