Step 1

Heat oil in a large pot over medium until shimmering. Add onion, bell pepper, garlic, and peppa sauce; cook, stirring occasionally, until softened, about 10 minutes. Add callaloo, stock, tomatoes, and house spice; cook, stirring occasionally, until callaloo starts to wilt, 4 to 5 minutes. Increase heat to medium-high, and bring to a simmer. Reduce heat to medium-low, and cover. Cook, stirring occasionally, until callaloo is tender, about 50 minutes.

Step 2

Increase heat to medium, and bring to a boil. Boil, stirring occasionally, until liquid is reduced by two-thirds, 10 to 15 minutes. Stir in salt, and serve.