Quinoa Stuffed Bell Peppers 1 medium onion, finely chopped (1 cup) 2 Tbs. olive oil 2 ribs celery, finely chopped (½ cup) 1 Tbs. ground cumin 2 cloves garlic, minced (2 tsp.) 1 10-oz. pkg. baby spinach 2 15-oz. cans diced tomatoes,…