Prep your produce. Clean and slice the mushrooms, mince the garlic, and finely chop the shallot.
Chop the thyme and parsley. Zest the lemon and set aside. Having everything ready makes the cooking smooth.
Brown the turkey. Heat 1 tbsp olive oil in a large skillet over medium-high.
Add the ground turkey, season with salt and pepper, and break it into crumbles. Cook until no longer pink and lightly browned at the edges, about 5–7 minutes. Transfer to a plate and keep warm.
Sauté the mushrooms. In the same skillet, add 1 tbsp oil and 1 tbsp butter.
Add the mushrooms in a single layer. Let them sit for 2–3 minutes to get color before stirring. Season with a pinch of salt.
Cook until golden and most of their moisture evaporates, about 6–8 minutes.
Add aromatics. Push mushrooms to one side. Add 1–2 tbsp butter to the empty space, then the shallot and garlic. Cook 1–2 minutes until fragrant and softened, stirring to keep the garlic from browning.
Deglaze and season. Pour in the broth to deglaze the pan, scraping up browned bits.
Add thyme and a pinch of red pepper flakes if using. Simmer 1–2 minutes to reduce slightly.
Return the turkey. Add the turkey back to the skillet and toss everything together. Stir in another 1 tbsp butter for a glossy finish.
Taste and adjust salt and pepper. Add lemon zest and a small squeeze of lemon juice to brighten the flavors.
Finish and serve. Turn off the heat. Sprinkle with chopped parsley.
If you like, add a spoonful of grated Parmesan for extra depth. Serve hot as-is, or over cauliflower rice, sautéed greens, or zucchini noodles.