01 -
In a large, heavy pan, melt butter over medium-high heat. Season chicken strips with salt and pepper, then add to the pan. Brown chicken on all sides, turning every couple of minutes, for about 8 minutes total. Remove chicken from pan (it's okay if it hasn't reached 165°F internal temperature yet).
02 -
Add diced garlic and onion to the same pan and sauté until browned, about 5 minutes.
03 -
Add chicken stock and roasted red peppers to the pan and let reduce by half, approximately 5 minutes.
04 -
Turn off the heat, and slowly stir in heavy cream and parmesan cheese, whisking vigorously as you add the cream to prevent curdling.
05 -
Gradually bring heat back to medium-high. Add Italian seasoning, pepperoncini peppers, and return chicken to the pan. Let sauce reduce by half and continue cooking until chicken reaches 165°F internal temperature. Add more stock if needed to adjust sauce consistency.
06 -
Remove from heat and serve over vegetables, pasta, rice, or enjoy on its own.