Preheat oven to 375 degrees. Toss potatoes with ½ teaspoon olive oil. Cover baking pan with parchment paper and place tomatoes, garlic and potatoes in pan.
Bake for 30 minutes or until a knife easy penetrates the tomatoes and potatoes.
Remove the pot from the burner, allow to cool slightly and then begin to puree with an immersion blender (or stand blender, please remember to vent for steam release). I like my soup a bit chunky so puree to your desired consistency. Top with Greek Yogurt for a bit of creaminess.