In a large Dutch oven, melt butter over medium-high heat. Add carrot and leek; cook for 4 to 6 minutes, stirring frequently. Add rice; cook for 2 to 3 minutes, stirring frequently. Add broth; cover and bring to a boil. Reduce heat, and cook until rice is just tender, 30 to 35 minutes. Remove from heat, and stir in spinach. Cover and keep warm until ready to serve.
In a 12-inch cast-iron skillet, heat oil over medium heat until hot. Sprinkle fish with coriander and salt. Add fish to skillet; cook until fish flakes easily with a fork, 3 to 4 minutes per side. Serve over rice with lemon wedges. Garnish with parsley, if desired.
Recipe by Taste of the South at https://tasteofthesouthmagazine.com/coriander-catfish-vegetable-brown-rice/