Pound chicken breasts with a meat mallet until uniform in thickness and season with salt and pepper. Heat a large, heavy non-stick or cast iron pan over medium high heat. Add the olive oil and then the seasoned chicken to the pan and cook, undisturbed until the chicken breast is golden brown, about 4-5 minutes per side.
While the chicken is cooking; in a high powered blender, blend together the cottage cheese, ½ cup of the chicken broth and sun dried tomatoes until smooth. If necessary, you can add in the remaining ¼ cup chicken broth to the blender to help get it a smooth consistency. Set aside.
When chicken is browned, remove it to a plate and add in the garlic, tomato paste, oregano and red pepper flakes and cook for 1-2 minutes, until fragrant and the tomato paste has darkened slightly. Stir in the cottage cheese mixture and whisk until fully combined. If you find the sauce to be too thick, add in the rest of the chicken broth or a splash more if you need it. The sauce will loosen as it heats up. Bring to a simmer, reduce the heat to low and place the chicken breasts back into the pan. Cover and simmer until the chicken is almost cooked through, about 10-12 minutes, stir in the spinach and parmesan cheese and replace the lid, cook until the chicken reaches 165℉ on an instant read thermometer, and the spinach has wilted down, about 2 more minutes. Taste and adjust seasoning.
Remove from the heat and garnish with chopped basil, grated parmesan cheese and chopped sun dried tomatoes. Serve with pasta or crusty bread and a salad.