How to Make It
Preheat the oven to 425°. In a saucepan, bring both oils to a simmer with the garlic. Cook over low heat until fragrant, 15 minutes. Strain the oil and discard the garlic.
In a large bowl, toss the mushrooms with 6 tablespoons of the garlic oil and season with salt and pepper. (Reserve the remaining garlic oil for later use.) Spread the mushrooms in a baking pan and roast for 35 minutes, stirring once or twice, until crisp and golden. Spread the pecans in a pie plate and toast for 7 minutes, until fragrant. Let cool.
In a large skillet, cook the bacon over moderately low heat, stirring frequently, until crisp, about 8 minutes. Using a slotted spoon, transfer the bacon to a paper towel–lined plate. Strain the fat into a heatproof bowl and return half of it to the skillet. Add the leek to the skillet and cook over moderately low heat until softened, about 6 minutes. Add the vinegar and simmer until reduced to 3 tablespoons, about 5 minutes. Remove from the heat and whisk in the sorghum, lemon juice and the remaining bacon fat.
In a large bowl, toss the greens with the vinaigrette, mushrooms and pecans. Season with salt and pepper and toss again. Sprinkle with the bacon and goat cheese and serve.