In a large pot. melt the unsalted butter over medium high. Add the cauliflower, cored and cut into florets, and cook, stirring occasionally, until cauliflower begins to brown, about 4 minutes. Add the garlic cloves, thinly sliced, and cook until fragrant, about 1 minute. Add the orange juice and honey; season with the salt and pepper and cook until liquid is reduced and syrupy, about 3 minutes

Add the broccoli rabe (about 1 pound), trimmed, cut into 1 1/2-inch pieces, and cook, stirring occasionally, until crisp-tender, about 3 minutes. Season to taste with the salt and pepper and serve immediately.