Heat the butter over medium-high heat.
Add the shallots and cook for 3-4 minutes until beginning to soften. Add the garlic and cook one minute until fragrant.
Add the peas and give everything a good stir. Cook for 4-6 minutes until peas are warmed through and bright green. Make sure not to overcook.
Season generously with salt and fresh black pepper. Top with lemon juice and zest if using. Finish with Parmesan.
