Tilapia with Olive Gremolata
and warm mustard potatoes and green beans
Tilapia fillets get a fresh finish from herb and olive gremolata. Potatoes and green beans baked alongside the fish make this a classic "sheet pan dinner."
Smarts: Boil potatoes in advance to give them a head start; they'll finish in the oven at the same time as the rest of the meal.
- Parsley - 1 cup, leaves torn
- Garlic - 1 clove, peeled
- Lemon zest - 1/2 tsp
- Lemon juice - 1 tsp
- Olives, any mix of pitted black and green - 1/2 cup
- Oil, olive - 3 Tbsp
- Lemons - 1, sliced
- Tilapia (sub any white fish, like flounder or halibut) - 1 lb
- Olive gremolata (ingredients listed separately) - ~1/4 cup
- Potatoes, baby or new - 1 lb
- Green beans - 12 oz, trimmed
- Oil, cooking - 1 Tbsp
- Mustard, Dijon (use whole grain mustard if you have it) - 3 tsp
- Honey - 1 tsp
- Oregano, dried - 1 tsp
- Sour cream (sub plain or Greek yogurt) - 4 Tbsp
- Boil potatoes - Double if making Wednesday’s meal. Bring a large stock pot of salted water to a boil. Add potatoes and reduce heat to a low simmer. Simmer, covered, until potatoes are tender, 18 to 20 minutes. Drain and rinse under cool water. If potatoes are too large to eat in one bite, slice in half or quarters. (Can be done up to 5 days ahead)
- Make gremolata - Tear parsley leaves, discarding stems. Peel garlic. Combine parsley, garlic, lemon zest and juice, olives and olive oil (the portion for gremolata) in a food processor (alternatively, you can finely chop all ingredients by hand and then mix with olive oil). Pulse or chop until all ingredients are in very small, even pieces. (Can be done up to 5 days ahead)
- Green beans / Lemons (for the fish) - Prep as directed and store separately. (Can be done up to 5 days ahead)
- Tilapia - Rinse and pat dry with paper towels. Season with some salt and pepper.
- Heat oven to 400F / 204C.
- While oven heats, whisk together cooking oil, mustard, honey and oregano. Toss with green beans and cooked potatoes (remember to reserve half the potatoes if doubled). Season with some salt and pepper. Spread on a sheet pan and set aside (don't cook it yet) while you prepare tilapia.
- Brush a second sheet pan with some oil and spread tilapia on top. Season tilapia with salt and pepper and top with lemon slices.
- Transfer both sheet pans to heated oven and bake until green beans are tender and fish is cooked through, 10 to 12 minutes. (Vegetables and fish should finish cooking at about the same time.)
- Discard lemon slices and top tilapia with gremolata. Enjoy with vegetables on the side. Add sour cream for potatoes, if you’d like. Enjoy!
This came together simply. The longest part was boiling the potatoes. I skipped the olives but made the sauce for the fish with just parsley and garlic, and it still turned out pretty good.0 Helpful
It was very yummy, but was step heavy - two different sauces and a few other things that made prep and execution a little longer than usual. We had a bit of substitutions due to using up what was in our fridge.0 Helpful
Note to self: lemon zest is easier to obtain BEFORE the lemon is sliced.0 Helpful
I precooked the beans before combining with potatoes and dressing. Didn't buy parsley but the olives sauce was tasty without it.0 Helpful
Loved this! Will blanche green beans next time for a minute or two since they were way crunchy.0 Helpful
We used rockfish instead (it was on sale at the market). Simple and delicious meal. The olive gremolata made the dish outstanding! Husband asked if I can make more olive gremolata for him so he can eat it with some crackers. :-) Oh and we cooked the potatoes and green beans for exactly 12 minutes in the oven. The green beans were perfectly cooked and crunchy.0 Helpful