*Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.
**Nutrient information is not available for all ingredients. Amount is based on available nutrient data.
(-)Information is not currently available for this nutrient. If you are following a medically restrictive diet, please consult your doctor or registered dietitian before preparing this recipe for personal consumption.
Heat olive oil in a skillet over medium-high heat. Cook and stir onion with salt in the hot oil until onion is lightly browned, 10 to 15 minutes. Stir crushed red pepper, black pepper, and garlic into onion; cook until garlic is fragrant, about 1 minute.
Stir black beans and tomatoes into onion mixture and cook until mixture is heated through, about 5 minutes. Remove from heat. Add spinach and cover to allow spinach to wilt, about 3 minutes. Toss and serve.