All the peppers, onions, Mexican spices and creamy guacamole you love in fajitas … jam-crammed into one gloriously, deliciously satisfying burger recipe!
Step 2 : In a small bowl, combine chili powder, cumin, garlic powder, onion powder, and 1 1/2 teaspoons salt to make spice mixture, stirring to combine thoroughly.
Step 3 : Peel the onion and cut away the stem and root ends, then cut the onion in 4 even pieces horizontally, keeping the concentric rings nestled together in planks.