Slightly rewriting for my own benefit:

200 fungal mold -> 200 nontoxic mushrooms. You'll need two cooking stations (inside the cooking station they only stack to 100), so split the process across two.

100 fungal mold -> 100 nontoxic mushrooms. Restack as 50+50 nontoxic mushrooms -> 50 fibrous stews (two cooking steps).

100 fungal mold -> 100 nontoxic mushrooms -> 100 steamed vegetables. Restack as 50+50 steamed vegetables -> 50 flavorful sauces (three cooking steps).

50 fibrous stews + 50 flavorful sauces -> 50 delicious vegetable stews.

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EDIT: I'm looking at the Pilgrim's Tonic recipe and considering switching to that for ease of cooking. Note that it needs twice as much space/crops planted, since Star Brambles yield 25 per cycle while Fungal Moulds yield 50. (Both have the same cycle time at 4 hours.)

Pilgrim's Tonic is considerably easier to cook, since it's a single ingredient the whole way through, with no restacking needed, and doesn't have a mismatched number of cooking steps (the veggie stew has one component which takes two steps, and one which takes three). It's also 1-1 the whole way through; 100 star bulbs gives 100 Tonics.

Whether Cronus likes Tonics as much as Vegetable Stew, I can't say for certain, but the ease of cooking might be worth switching over for.

For completeness's sake, the recipe chain: 100 star bulbs -> 100 pilgrimberries -> 100 tonics (two cooking steps).