Heat the extra virgin olive oil in a large non-stick or cast-iron skillet over medium-high heat until shimmering.
Add the ground chicken to the skillet. Cook for 5-7 minutes, breaking the meat into small crumbles with a spatula, until fully browned and no pink remains.
Introduce the diced red onion and chopped bell pepper to the skillet. Sauté for 3-4 minutes until the vegetables reach a tender-crisp texture.
Add the minced garlic, dried oregano, smoked paprika, salt, and black pepper. Stir constantly for 60 seconds to toast the spices without burning the garlic.
Incorporate the halved cherry tomatoes and sliced Kalamata olives. Cook for 2-3 minutes until the tomatoes just begin to soften and release their juices.
Fold in the fresh baby spinach. Stir for 1 minute or until the leaves are completely wilted into the mixture.
Remove the skillet from heat. Drizzle with fresh lemon juice and stir to emulsify the pan juices.
Garnish with crumbled feta cheese and chopped fresh parsley. Serve immediately.