Mission tostadas, world's best selling tortilla. Healthy and delicious, mission baked tostadas are a fast, mouth-watering solution for snacks, appetizers, and authentic mexican dishes alike. Make an open-faced taco today with mission. Try these other fine mission products: flour tortillas, taco shells and our crispy authentic mexican tortilla chips in the original brown bag! 96% fat free. 0G trans fat per serving. No lard, no cholesterol. Taste, nutrition, quality.