Method
Heat a large sauté pan over high heat until fully heated.
Add oil to the pan and coat the bottom of the pan.
Season each breast and sear on the skin side until a deep brown crust has formed. It is important not to move the chicken around during the sear phase.
Flip the chicken over and sear the second side.
Top each breast with the garlic and thyme and add the butter to the pan. The butter will melt and foam. Using a spoon baste the breasts with the melted butter so the garlic and thyme can cook.
Method
Preheat oven to 450°F.
Rub the tomatoes with olive oil and sprinkle with salt and pepper and place cut-side up on a baking sheet.
Place the onions, garlic and peppers on the same tray as the tomatoes.
Roast for 20-30 minutes, or until soft.
Put roasted vegetables and the remaining ingredients into a blender and blend on pulse until smooth.
Serve over pan seared chicken breast.