1: Preheat the oven to 400°F.
2: Chop the cauliflower, mushrooms, and asparagus.
3: In a large bowl, mix the beef with olive oil, smoked paprika, ground cumin, chili powder, crushed red pepper, garlic powder, black pepper, and salt.
4: Add the vegetables to the bowl and toss to coat them in the seasoning.
5: Spread the mixture on a baking sheet in a single layer.
6: Roast in the oven for 25-30 minutes until the beef is cooked through and vegetables are tender.
7: Drizzle with lemon juice before serving.
