1. When picking berries, look for those that are firm, plump, and without blemishes for the best results.
2. If you're not a fan of feta, you can replace it with goat cheese or leave it out altogether.
3. For an added touch of zing, you can include a squeeze of fresh lemon in your dressing.
4. Always dress your Mixed Berry and Spinach Salad right before serving to keep the spinach fresh and avoid it becoming soggy.