Preheat a large skillet over medium-high heat. Once hot, add oil and swirl to coat the bottom; add beef tips and cook, turning occasionally, 8-10 minutes, until internal product temperature reaches 165°F on a meat thermometer. Remove to a plate and loosely cover with aluminum foil to keep warm. (Reserve skillet, with cooking juices, for later use.)
Meanwhile, wash and dry the fresh produce.
Peel and mince garlic. Place in a large bowl along with oil, vinegar, salt, and pepper. Whisk to combine the dressing.
Halve cherry tomatoes. Add to the bowl with the dressing, along with mozzarella, and stir to coat.
Pick basil leaves off the stems. Chop or tear lettuce into bite-sized pieces. Add both to the bowl and toss to combine the salad. Set aside.
Preheat a grill pan or outdoor grill over medium-high heat. While the grill heats up, slice bread into 4 pieces, then drizzle both sides with oil. When the pan is hot, add bread and grill until charred, 1-2 minutes per side. Remove from heat.
Divide salad between plates and top with beef tips. Serve with grilled bread on the side and enjoy!