If your homemade mayonnaise separates, you can often fix it by whisking in a tablespoon of cold water. If that doesn't work, start with a new egg yolk in a bowl and gradually whisk in the broken mayonnaise. This simple hack can save your sauce and restore its creaminess.
Next time you're grilling, use a bunch of rosemary sprigs tied together as your basting brush. It's a helpful tip that gives your food a hint of rosemary flavor and makes your backyard smell wonderful, too. Tie them up, dip in oil, and brush on your meats or veggies.