In a medium saucepan, combine broccoli, broth, onion, herb, pepper, and garlic powder. Bring to boiling. Reduce heat. Simmer the mixture, uncovered, for 5 minutes.
Stir together the evaporated milk and the flour until smooth. Add to the mixture in the saucepan. Cook and stir until thickened and bubbly. Cook and stir for 1 minute more. Makes 4 side-dish servings.