Yes, you can mix fresh and dried aromatics in one dish, but you should adjust the quantities to account for the difference in intensity. Dried herbs and spices are generally more potent than their fresh counterparts.
Mixing fresh and dried aromatics can add complexity and depth to your cooking. The key is understanding the difference in flavor intensity. Dried herbs and spices have a more concentrated flavor because the moisture has been removed. This means you'll typically need less of a dried aromatic compared to its fresh equivalent.
Here's a general guideline for substitution:
For example, if you're making a tomato sauce, you might add dried oregano and basil at the beginning of the simmering process, and then stir in fresh basil and parsley just before serving for a burst of freshness.
When using dried spices, lightly toast them in a dry pan before adding them to the dish. This helps to release their essential oils and enhance their flavor. Be careful not to burn them!