This unusual combination of flavors wakes up your palate.
Combine the vinegar, mustard, brown sugar, ketchup, orange zest and salt.
With an immersion blender running, slowly add the oil until the dressing has thickened up. If you prefer a thicker dressing, add one extra tablespoon of ketchup.
In a large bowl, combine the grapefruit, orange, almonds and mixed greens.
Toss salad with dressing and top with tongue slices.
Segmenting an orange or any citrus fruit refers to removing all the outside skin and separating the fruit from the rind using a paring knife.