The phrase "bare simmer" means to cook something on low heat, just enough to create gentle bubbles and keep the liquid warm without boiling. Full definition
Bring to boil over high heat; reduce heat to medium - low and cook at bare simmer until just tender (potatoes will offer very little resistance when poked with paring knife), 40 to 45 minutes. (wellvegan.com)
Bring lemon, garlic, oil, salt, and red pepper flakes to a very bare simmer in a small saucepan over low heat and cook (without stirring) until lemon is just tender, 20 — 30 minutes. (bonappetit.com)
The Pfizer site project has laid bare simmering tension between Williamsburg's Jewish and Latino populations, and has led to anger and protests from activists for years. (dnainfo.com)