Boil water in a large pot or saucepan and blanch the green beans for 2-3 minutes. Drain and set aside.
Heat a large skillet over medium heat add avocado oil once hot. Cook the almond slices for about 30 seconds, stirring constantly. Watch closely as they cook quickly.
Add minced garlic and cook for 1 minute, stirring until the almonds are toasted and the garlic is fragrant.
Reduce the heat to low-medium, add the blanched green beans, and sauté for 1-2 minutes, depending on your preferred tenderness.
Place in a serving dish and season with salt, freshly squeezed lemon juice, and Parmesan cheese if desired.
