Season chicken thighs with salt and pepper
Heat olive oil in a large skillet over medium-high heat
Add chicken thighs, skin-side down, and cook for 6–7 minutes until golden and crispy
Flip chicken and cook for another 6–7 minutes until fully cooked (internal temperature of 165°F or 74°C)
Remove chicken from the skillet and set aside
In the same skillet, add diced onion and cook for 3–4 minutes until softened
Add crushed garlic and cook for 30 seconds until fragrant
Stir in peas and cook for 2–3 minutes until heated through
Add lemon juice and zest, stirring to combine
Return chicken to the skillet and toss to combine with the peas and sauce
Sprinkle with fresh chopped herbs and serve warm