Grilled Vegetables

Bahan-bahan (4 porsi)

• 1 medium zucchini (sliced diagonally, ½" thick)
• 1 small red onion (cut into wedges)
• 1 red bell pepper (or orange, cut into 1" wide strips)
• 8 ounces large fresh mushrooms ( halved)
• 1 bunch asparagus (trimmed)
• 4 Roma tomatoes (or 8 campari tomatoes)
• 2 tablespoons olive oil
• 1 tablespoon melted butter
• 1 tablespoon fresh lemon juice
• 1 tablespoon chopped fresh parsley
• 2 cloves garlic (minced)
• ¼ teaspoon salt (more to taste)
• ¼ teaspoon black pepper
• thinly sliced fresh basil leaves (for serving, optional)