Don't be deceived by this recipe's simplicity. You will find it such a refreshing and perfect way to enjoy your summer cucumbers, and it will pair with so many dishes.
Trim both ends of cucumber. Cut in half and slice in thin strips, using either a food processor or mandolin. You can also slice it crosswise, and a knife will work just fine. Do the same with red onion.
Cut the tomatoes in half, and cut the asparagus in 1 inch pieces on the diagonal.
Place all the vegetables in a bowl. In a separate bowl, mix the vinegar, water and sugar. Pour over the vegetables and toss.
Allow to sit for at least 10 minutes to take in the flavor. Arrange on a platter to serve.