Averna is one of my go-to amaros, especially for drinking on it's own. The addition of grapefruit bitters to this simple spritz changes everything. Taste it for yourself.
2 oz Averna
3 oz soda water
3-4 dashes The Bitter Housewife Grapefruit Bitters
Combine all ingredients in a highball glass with ice, stir gently to mix, and garnish with grapefruit twist.