Pre heat oven to 375
slice sweet potatoes in slightly thick rounds
Add on baking sheet and drizzle with olive oil, salt and pepper and roast for about 35 min or until soft. Set aside
Using a mandoline or sharpe knife, slice your watermelon radishes slightly thick but not too thick and set aside
In a large skillet, heat 1 tbsp olive oil. Sautee onions and garlic until translucent. about 5 min.
Add the ground beef and break it up for about 5 min.
Next add all of your spices and cook until meat is no longer pink.
Add tomato paste and mix well. Then add the beef broth and cook until it thickens up slightly and liquid is gone.
In a small skillet, add a dash of olive oil and heat up frozen cauliflower and cooked through (5-7 min). Season with salt and pepper and set aside.
Now build your tostada! on your sweet potato or watermelon radish, add your cauliflower rice, then top with meat, sliced avocado, sliced cherry tomatoes, and chopped cilantro.
Squeeze lime juice on top and sprinkle some finishing salt (optional)
Enjoy :)
This would make awesome leftovers as well. If you make this as a taco then do this version as a leftover lunch. So good!