
In a large bowl, whisk together eggs, kosher salt, garlic powder, onion powder, and black pepper until light and fluffy, set aside.
In a large skillet, heat olive oil over medium heat. Saute jalapeño, tomato, and onions until soft and tender, about 5-8 minutes.
Pour the eggs into the skillet and let them cook for about 30 seconds. Then, continue gently stirring until the eggs are just cooked through, about 2 minutes.
Take the skillet off the heat and taste for salt and pepper.
Assemble the breakfast tostadas by spreading 2 tablespoons of refried beans on the tostada shell. Add the scrambled egg mixture, then top with queso fresco, chopped cilantro, sliced avocados, and salsa. Assemble the remaining tostadas and serve immediately.