Combine flour, parmesan, garlic powder and black pepper in a shallow bowl. Dredge chicken tenders in flour mixture.
Heat a large skillet over medium heat with 2 tbsp olive oil and 1 tbsp butter. Add coated chicken tenders and cook 3 minutes each side. Internal temp should be 165°. Remove from pan.
Add remaining olive oil and butter. Peel garlic. Smash 6 cloves to release flavor. The remaining cloves will soften and roast. Add peeled garlic and chopped onion to the pan. Sauté for 5 minutes.
Add chicken broth to the pan scraping any stuck pieces from the bottom. Simmer for 5 minutes.
Reduce heat and add heavy cream. Gently simmer for 3 minutes.
Add cheese, stirring occasionally for 3 minutes.
Return chicken to the pan and cook covered for 3 minutes.