Season the chicken breasts with salt, pepper, garlic powder, and onion powder.
Heat olive oil in a skillet over medium heat and sear the chicken for 2 minutes per side until golden brown.
Transfer the chicken to the crockpot.
In a bowl, mix heavy cream, chicken broth, Parmesan cheese, sundried tomatoes, oregano, and red pepper flakes.
Pour the mixture over the chicken in the crockpot.
Cook on low for 4-5 hours or on high for 2-3 hours, until the chicken is tender.
Garnish with fresh basil before serving.