Preheat your oven to 425°F and line a large baking sheet with parchment paper.
Trim the ends of the green beans and place them on the prepared baking sheet.
Toss the green beans with 0.5 tablespoons of olive oil, minced garlic, half of the sea salt, and half of the black pepper.
Spread the beans in a single layer and roast for 15 to 18 minutes until they are tender and the edges are slightly charred.
While the beans roast, season the chicken breast with the remaining sea salt and black pepper.
Heat the remaining 0.5 tablespoons of olive oil in a skillet over medium-high heat.
Sear the chicken for 6 to 8 minutes per side until the internal temperature reaches 165°F and the exterior is golden brown.
During the final 3 minutes of roasting the green beans, sprinkle the sliced almonds over them to toast until fragrant.
Remove the beans from the oven, drizzle with fresh lemon juice, and serve immediately alongside the pan-seared chicken.