Spice up your "Taco Tuesday" and make tostadas - an "open-faced" taco with all of your favorite taco flavors and toppings such as ground beef, lettuce, tomatoes, green onions, cheese, and avocados. The sweet and spicy roasted butternut squash served on the side rounds out the meal nicely. Smarts: Spread the butternut squash in a single layer, leaving room between the cubes of squash so that it roasts (think yummy golden color!) instead of steams and becomes too soft.
Make taco seasoning - (If prepping right before cooking, get oven heating before continuing with prep.) Combine chili powder, paprika, salt, cumin, coriander, and garlic powder. (Can be done up to 5 days ahead)
Squash - Cube squash. (Can be done up to 5 days ahead)
Season beef - Combine beef with taco seasoning (portion for tostadas). (Can be done 1 day ahead)
Cheese / Green onions - Prep as directed. Store separately. (Can be done 1 day ahead)
Toss squash with oil and taco seasoning (portions for squash). Spread butternut squash out onto a sheet pan. Roast for 25 to 35 minutes, shaking the pan halfway through cooking, until golden and caramelized.
When squash is nearly finished, heat a skillet with first part of oil (for tostadas) over medium heat.
Add beef and saute until cooked through, 5 to 7 minutes. Season with some salt and pepper. Cover to keep warm.
Bake tostada shells by brushing both sides of tortillas with second part of oil (portion for tostadas) and spread them out in a single layer on a sheet pan. Bake tortillas until crisp, 3 to 4 minutes on each side.
Set out tostada ingredients - tostada shells, beef, cheese, green onions, lettuce, tomatoes, avocados, sour cream, and salsa so that everyone can assemble their tostadas at the table.