Heat two tablespoons of olive oil in a large skillet. Add the garlic and cook for 1 minute, until it begins to sizzle and you can smell it. Add the asparagus and cook for 2 minutes, until it becomes bright green and softens slightly. Add the ham and cook for 1 to 2 more minutes, until heated through. Turn off the heat and add the warm, cooked pasta to the skillet.

In a small dish, whisk together the remaining two tablespoons of olive oil, lemon juice, salt, and pepper. Pour into the skillet and toss all ingredients together. Garnish with Parmesan before serving.