01 -
Turn your broiler on low to warm up first.
02 -
Stir together sour cream and lime zest in a small bowl to make a tangy cream. Put aside for later.
03 -
Arrange the green peppers on a foil-covered baking sheet. Give them a light spray of oil and sprinkle with salt and pepper. Cook under the broiler for about 4-5 minutes until they get soft.
04 -
Spread tortillas on another foil-covered baking tray. Spray both sides with oil. Broil them until they turn crispy and golden, roughly 1-2 minutes per side. Watch them closely so they don't burn.
05 -
Toss together the broiled peppers, tomato cubes, cilantro, radish slices, cabbage strips, 2 tablespoons oil, lime juice, and chopped garlic in a bowl. Mix well and add salt and pepper. Set this aside.
06 -
Put a big non-stick pan on medium-high heat. Pour in 2 tablespoons oil, then cook the beef strips until they're brown, about 1-2 minutes each side. Take off heat and cut into smaller ⅛-inch bits.
07 -
Put some cabbage mix on each crispy tortilla. Add beef pieces, sprinkle with cotija, drop some lime cream on top, and finish with a lime wedge.
08 -
Put your tostadas on a big plate. Eat them right away for the best taste.