Heat the oven to 400°F. Lightly grease 8 cups of a standard muffin tin.
In a large bowl, combine the ground turkey, egg, breadcrumbs, onion, 1 tablespoon of the ketchup, Dijon mustard, dried thyme, salt, and black pepper. Mix gently just until combined.
Divide the mixture among the 8 prepared muffin cups. Shape each portion into a small mound and spread the remaining 1 tablespoon of ketchup over the tops.
Toss the green beans with the olive oil and minced garlic. Spread them in a single layer on a rimmed baking sheet.
Place the muffin tin and baking sheet in the oven. Roast for 20 to 25 minutes, until the meatloaf muffins reach 165°F in the center and the green beans are tender with lightly browned edges.
Let the muffins rest in the tin for 5 minutes, then loosen the edges and lift them out. Serve with the garlic green beans.