Baked Halibut with Spring Vegetables

Ingredients

• 1 lb. halibut, skin off, cut into 4-6 pieces
• 1 bunch asparagus, trimmed, halved lengthwise if thick
• ½ large yellow bell pepper or three small bell peppers
• Handful of cherry tomatoes, halved if large
• 4 tablespoons olive oil, divided
• 4 tablespoons unsalted butter, melted and divided
• Aleppo pepper
• Kosher Salt
• Black pepper
• 1 lemon