Black Bean Enchiladas

Ingredients

• 1 small onion, chopped
• 1 Tbsp. vegetable oil
• 1 (16 oz.) can crushed tomatoes
• 1/2 tsp. dried oregano
• 1/2 tsp. salt, divided
• 1 c. Ricotta cheese
• 1 (16 oz.) can black beans, drained
• 4 oz. Jack cheese, shredded (1 c.)
• 1 (4 oz.) can chopped green chilies
• 8 corn tortillas