The Beech Tree might not be the trendiest trat in town, but for those who value substance over surface flash, the five-month-old east-side bistro more than fills the bill. Taking his culinary cues from UK gastro-pub heavyweights Heston Blumenthal and Marco Pierre White, Robert Maxwell isn’t out to reinvent the wheel. You’ll find no deconstructed tacos or silly foam frou-frous here. Superfluous garnish is a foreign concept…