1 Dumbbell Total Body Workout

In this video, First Capital Gym coach Ryan Zuver demonstrates a workout consisting of just 1 dumbbell
Split Squats x 5e
Split Stance Row x 10e
Floor Press w/ Bridge x 8e
Single Leg Row x 5e
Single Leg Deadlift x 5e
Standing Press x 5e
Goblet Squat x 8

You can perform 3-5 sets of this with 1-2 minute breaks in between circuits.