In a generous, abundant, or plentiful manner.
From 'bountiful' (adjective meaning generous and abundant, from 'bounty') plus the suffix '-ly' to form an adverb describing how actions occur with abundance.
Mediterranean gardens grow 'bountifully'—tomatoes, olives, and citrus pour forth in such profusion that one plant can feed an entire family for months.
Complete word intelligence in one call. Free tier — 50 lookups/day.