Mix the mayonnaise, sour cream, chives and mustard in a bowl.
Bring a saucepan of water to a boil. Add the rice, 1/2 teaspoon salt and a few grinds of pepper; reduce the heat to low and simmer until almost tender, about 15 minutes. Add the asparagus and simmer until the rice and asparagus are tender, about 3 more minutes. Drain in a fine-mesh sieve and rinse under cold water, stirring gently to remove excess water. Transfer to a large bowl and stir in the lemon juice and half of the prepared chive sauce; season with salt and pepper.
Heat the butter in a large nonstick skillet over medium-high heat. Add the ham steaks, overlapping as necessary, and cook, flipping occasionally, until golden, about 5 minutes. Sprinkle the brown sugar over the ham and cook, flipping often, until the sugar melts. Season with pepper. Serve with the rice salad, the remaining chive sauce and lemon wedges.
Photograph by Justin Walker
Recipe courtesy of Food Network Magazine