In the same skillet, add 1 Tbsp of olive oil until heated.
Add in 1-2 Tbsps tuscan blend seasonings and stir until well combined.
Reduce the heat to medium-low and slowly add in the heavy cream, chicken stock, lemon juice, lemon zest, and white wine, stirring until combined. Let it slightly bubble for 1-2 minutes and then add in the grated parmesan, whisking until fully melted and sauce thickens, about 2-3 minutes. Add in the lemon slices, stirring them into the sauce.
Add in the chopped kale, stirring until combined and return the chicken breasts. Let everything simmer for 15-20 minutes or until the chicken is cooked through and tender.
Stir the sauce occasionally and spoon it unto the chicken breasts as they continue to cook.
Remove from heat once done.
To serve, enjoy the chicken with your favorite side (i.e. rice, pasta, veggies, etc.). Garnish with a bit of grated parmesan (for extra cheesy flavor), if desired.