Mince garlic; and finely chop onion, carrot and celery.
Heat up olive oil in a skillet over medium heat. Add garlic, onion, celery and carrot and cook for a few minutes until fragrant.
Add turkey mince to skillet and cook until no longer pink.
Add frozen vegetables and cook for a few minutes, stirring frequently.
Add tomato paste, thyme and Worcestershire sauce. Stir to combine.
Dissolve flour in chicken stock, and add to skillet. Stir and cook until thickened to desired consistency.
Remove from heat. Taste and add salt and pepper according to your preference. Then pour everything into a baking dish. Let cool completely.