What's this? Help please

Looks like an aphid or thrip. Aphids tend to congregate at the stems and on the underside of leaves, thrips can be found on the leaves. You can treat a number of ways... Using a foliar spray of water and a couple drops of dish soap, or there are also many commercially made sprays for aphids, just make sure they're safe to use on edible/consumable plants. If you have a contained growing space you can also look into introducing ladybugs to your garden. They love eating aphids. Hope that answers your question. Best wishes!

Thrips if I'm not mistaken, you can look into neem oil but at your own risk. Some people swear by it others blame it for killing plants. Just do your own research n do what you feels best for you. Good luck.