Grilled Tuna& Vegetables W/yellow Pepper Sau

• 140 gr bell pepper (yellow chopped)
• 120 ml garlic oil
• 80 gr tuna steaks
• 120 ml chicken stock
• 60 gr onion (chopped)
• 16 ml olive oil
• 16 ml garlic oil
• 2 gr thyme
• 3 slices russet potatoes (sliced)
• 1 slice zucchini on bias (sliced)