Prepare the Chicken. Preheat your oven to 375°F (190°C).
Place each chicken breast between two sheets of plastic wrap and pound to an even thickness of about 1/4 inch using a meat mallet or rolling pin.
Season both sides of the chicken breasts with salt, pepper, smoked paprika, and dried thyme.
Prepare the Filling. In a large skillet, heat 1 tablespoon of olive oil over medium heat.
Add the minced garlic and cook until fragrant, about 1 minute.
Add the chopped spinach and cook until wilted, about 2-3 minutes. Remove from heat and let cool slightly.
In a mixing bowl, combine the wilted spinach with the shredded Edam cheese. Assemble the Chicken. Divide the cheese and spinach mixture evenly among the chicken breasts, placing it in the center of each.
Roll up each chicken breast tightly and secure with kitchen twine or toothpicks.
Sear the Chicken. In the same skillet, heat the remaining 1 tablespoon of olive oil over medium-high heat.
Sear the rolled chicken breasts on all sides until golden brown, about 3-4 minutes per side.
Bake the Chicken. Transfer the seared chicken breasts to a baking dish and bake in the preheated oven for 20-25 minutes, or until the chicken is cooked through and the internal temperature reaches 165°F (74°C).
Prepare the Sauce. While the chicken is baking, prepare the sauce. In the same skillet, melt the butter over medium heat.
Add the chopped onion and garlic and cook until softened, about 5 minutes.
Add the white wine and bring to a simmer, scraping up any browned bits from the bottom of the skillet.
Stir in the chicken broth, heavy cream, and Dijon mustard. Simmer until the sauce thickens, about 5-7 minutes.
Season with salt and pepper to taste.
Serve: Remove the chicken breasts from the oven and let rest for a few minutes. Remove the kitchen twine or toothpicks.
Slice the chicken breasts into medallions and arrange them on serving plates.
Spoon the white wine and herb sauce over the chicken and garnish with chopped fresh thyme.
Serve with your favorite side dishes, such as roasted vegetables or a fresh salad.