Three-Cheese Mushroom and Spinach Calzone

INGREDIENTS

1 tbsp

olive oil, plus additional for brushing

1 8 ounce package

sliced crimini (baby bella) mushrooms

3/4 tsp

fennel seeds

garlic cloves, minced

1/2 tsp

dried oregano

4 cups

baby spinach, packed

All-purpose flour, for sprinkling

1 lb

fresh pizza dough (or one 13.8-ounce tube refrigerated)

5 tbsp

grated Parmesan cheese, divided

1 1/2 cups

grated mozzarella cheese, divided

1/4 cup

whole-milk ricotta cheese

1/4 tsp

dried crushed red pepper

Accompaniment: 1 1/2 cups warm marinara, for dipping