Preheat your grill to medium heat.
In a bowl, combine the chili, paprika, onion powder, garlic powder, cumin, and thyme. Season to taste with salt and pepper.
1 tsp. chili powder, ½ tsp. paprika, ½ tsp. onion powder, ½ tsp. garlic powder, ½ tsp. cumin, 1 tsp. dried thyme, Sea salt and freshly ground black pepper
Place the cleaned and trimmed Brussels sprouts in a large bowl, then drizzle with olive oil and lemon juice.
1 tbsp. fresh lemon juice, ¼ cup olive oil, 1 lb. of Brussels sprouts
Sprinkle the spice mixture over the sprouts, and gently toss everything until well-covered.
Place sprouts on the preheated grill and cook until tender, about 10 to 12 minutes.