Rinse the peas under warm water and shake off excess liquid.
Smash and peel the garlic cloves.
Add the butter and olive oil to a large skillet over medium-high heat. Add the smashed garlic and frozen peas and cook for 2 minutes until warmed through but still bright green.
Zest the lemon. Season with the kosher salt, fresh ground pepper and lemon zest. Discard the garlic cloves and serve immediately.