Heat a large, deep skillet or sauté pan over medium low. Add half the oil to the skillet. Once the oil is hot, add the shallot. Cook until slightly softened, about 2 minutes, not allowing the shallot to brown. Add the broccoli, garlic, salt, and pepper. Sauté until the broccoli is crisp-tender, about 3 to 4 additional minutes. Remove the broccoli and shallots from the skillet and set aside.