Slow Cooker Veggie Lasagna

Ingredients

• 2 Tbsp. olive oil
• 2 cups mushrooms, chopped
• 1 cup Red Sun Farms® bell peppers, seeded, chopped
• 1 large onion, finely chopped
• 3 cups spinach, chopped
• 1 lb. 2% cottage cheese
• 2 cups (plus ½ cup) shredded mozzarella cheese, divided
• ¼ tsp. salt
• 1 jar (26 oz.) pasta sauce
• 2 large zucchini, sliced ¼-inch thick
• 8 oz. no-boil whole wheat lasagna noodles