Position oven rack to the middle and pre-heat to 350 F.
Heat your pan to medium on the stove. Add ground beef and taco seasoning. Crumble and brown until no pink remains. Drain all excess fat and liquid from the pan -- this is important so your taco cups don't get soggy.
Remove from heat. Add salsa, black beans, lemon juice, and cheddar. Stir until combined. Let this cool for 10-minutes.
Coat your muffin pan with a thin layer of cooking spray. Add your tortillas to the muffin pan, using your fingers to firmly press them down and form to the pan. You want your tortillas to form a cup shape. Then, spray the inside of the taco cups with cooking spray again.
Scoop your meat and bean mixture into tortilla cups, using about 3 Tbsp of filling in each. Press the mixture down and flatten the tops.
Bake for 30 minutes or until tortilla cups are golden and crisp. Let cool for 5-10 minutes before adding toppings and serving. Enjoy!
Serving: 1taco cup, Calories: 211kcal, Carbohydrates: 18g, Protein: 13g, Fat: 9g, Saturated Fat: 4g, Polyunsaturated Fat: 1g, Monounsaturated Fat: 3g, Trans Fat: 0.2g, Cholesterol: 34mg, Sodium: 470mg, Potassium: 227mg, Fiber: 2g, Sugar: 2g, Vitamin A: 205IU, Vitamin C: 1mg, Calcium: 122mg, Iron: 2mg