Preheat your oven to 425°F and line a baking sheet with parchment paper.
Slice the russet potato into thin, uniform fries and toss them in a bowl with half of the olive oil, the minced garlic, and a pinch of sea salt.
Spread the potato fries in a single layer on the baking sheet and roast for 20-25 minutes, flipping halfway through, until golden and crispy.
While the fries roast, season the sirloin steak and chicken breast on both sides with sea salt, black pepper, and dried oregano.
Heat a grill pan or cast-iron skillet over medium-high heat with the remaining olive oil.
Grill the steak and chicken for 5-7 minutes per side, or until the chicken reaches an internal temperature of 165°F and the steak is cooked to your preferred doneness.
Steam the haricots verts in a steamer basket over boiling water for 3-5 minutes until they are bright green and tender-crisp.
Allow the meat to rest for 3 minutes before slicing, then serve alongside the garlic fries and steamed haricots verts.