These Grilled Vegetable Tostadas feature grilled seasoned summer vegetables served on fried tortillas and topped with tomato salsa, fresh guacamole, cilantro, lime, and a drizzle of hot sauce.
Add oil to a large bowl. Combine with chili powder, cumin and garlic. Set aside.
Slice onion crosswise into 1/4 inch disks. Remove tops and slice the eggplant, zucchini and yellow squash lengthwise into 1/4 inch strips. Salt both sides and place in a colander to drain for 30 minutes to an hour. Rinse salt from the vegetables and pat dry with paper towels.
Fire up the grill and allow to heat to medium-high. (These can also be made in the oven under the broiler). Toss the vegetables in the chili oil to coat.
Grill the vegetables on each side until lightly browned and softened. About 3-4 minutes per side.
Move to a platter when done and cover with aluminum foil to keep warm.
Place 1 inch of vegetable oil in a heavy skillet, heat to medium-high. Fry the tortillas one at a time on each side until golden brown, being careful to not overcook. About 30 seconds per side. Place the tortillas on paper towels to drain.
To assemble, place 2 tortillas side by side on a serving plate. Arrange grilled vegetables over the tortillas, and top with salsa, guacamole, cilantro, a drizzle of sriracha, and a squeeze of lime. Serve.