Artichoke, Spinach, and Feta Stuffed Shells

dried oregano

chopped pepperoncini peppers

fire-roasted crushed tomatoes with added puree (such as Progresso)

no-salt-added tomato sauce

shredded provolone cheese, divided

crumbled feta cheese

fat-free cream cheese, softened

freshly ground black pepper

frozen artichoke hearts, thawed and chopped

frozen chopped spinach, thawed, drained, and squeezed dry

garlic cloves, minced

cooked jumbo shell pasta (about 8 ounces uncooked pasta)

Cooking spray