In an airtight container, whisk together the balsamic vinegar, extra-virgin olive oil, Dijon mustard, minced garlic, salt, and pepper until well combined.
Add red onion slices and cherry tomatoes to the airtight container.
Then place the arugula leaves on top of the cherry tomatoes and red onion slices.
Add the vinaigrette, then sprinkle the chopped almonds and crumbles feta cheese on top.
Close the lid and toss until all ingredients are well-coated.
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Nutritional values are estimates only and do not include carbs from sugar alcohols.
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