In an 8" cast iron skillet over medium heat, add olive oil. Add garlic to pan and cook for 1 minutes. Mince herbs and dice tomatoes, discarding juicy parts of the tomato. Add to pan and cook for 2-3 minutes.
Whisk milk, eggs, and salt together. Pour over tomatoes and sprinkle with goat cheese. Cook for 1-2 minutes on stove top until bottom is set. Finish in the oven for 10-15 minutes or until egg is set.