- 3 cups veggie or fish broth
- 1/2 medium red onion, very thinly sliced (about 1/3 cup)
- 2 cups cherry tomatoes, cut in half lengthwise, divided
- 8 ounces fingerling potatoes, sliced crosswise into 1/4-inch rounds
- 3 sprigs basil, plus fresh basil leaves for garnish
- 1/4 teaspoon red-pepper flakes
- Coarse salt and freshly ground pepper
- 4 skinless cod fillets (4 ounces each)
- 4 ounces sugar snap peas, trimmed and thinly sliced on the bias
- 1 teaspoon fresh lemon juice, plus 4 lemon wedges, for serving
- Extra-virgin olive oil, for drizzling
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Bring broth, onion, 1 1/2 cups tomatoes, potatoes, basil sprigs, red-pepper flakes, and 2 teaspoons salt to a boil in a large, deep, straight-sided skillet with a tight-fitting lid. Reduce heat and simmer, uncovered, until potatoes are crisp-tender, 6 to 8 minutes. Season cod with salt and pepper, add to broth mixture, and cover. Simmer until fish is opaque throughout and just cooked through, about 7 minutes.
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Remove and discard basil sprigs. Add sugar snaps, remaining 1/2 cup tomatoes, and lemon juice to skillet, gently stirring to combine; cook just until warmed through. Divide fish, vegetables, and broth among 4 bowls. Garnish with basil leaves, drizzle with oil, and serve with lemon wedges for squeezing.